138127754939 has 2 divisors, whose sum is σ = 138127754940. Its totient is φ = 138127754938.

The previous prime is 138127754923. The next prime is 138127754959. The reversal of 138127754939 is 939457721831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138127754939 - 2⁴ = 138127754923 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (138127754909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69063877469 + 69063877470.

It is an arithmetic number, because the mean of its divisors is an integer number (69063877470).

Almost surely, 2^138127754939 is an apocalyptic number.

138127754939 is a deficient number, since it is larger than the sum of its proper divisors (1).

138127754939 is an equidigital number, since it uses as much as digits as its factorization.

138127754939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11430720, while the sum is 59.

The spelling of 138127754939 in words is "one hundred thirty-eight billion, one hundred twenty-seven million, seven hundred fifty-four thousand, nine hundred thirty-nine".